Baffle system for stirling boilers.



UNITED s'rnrnsfi rnr.rioni.'

i nvms...mconus, oF JERSEY ommusnwnnnsnr, 4Ass'reiv'o' It ro THE seacock a wrLcox company',- or Bayonne-NEW" JERSEY, A.'- CORPORATION OF NEW smog-aes.-

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,siaeeifmanonof:Lettersrateale v Patentedug.19,1`913g appneatian'ne'axanuay.e, imag semaine. $39,721.

ToaZZ whom t may concern. i [Be it known that 1, Dvm S. JACOBUS, a5 .citizen of'gthey United-States, -residing at Jersey City, in the Vcounty of Hudson and 5 StateofNew Jersey',"'hav'e linvented certain new and useful Improvements in Baffie Systeis for'Stirli'ng Boilers, of-A whicl1` the followingfis a specification; My invention relates toa system offsp'ecia'l bale's and water circulate-'ors for use'in oonnection with Stirlingboilers, and 'willbe understood byreference 'to' the laccom'pa'nyling` drawings in w'hich-' l Figure 1 'is a side elevation, partly'in sec, tion', of a Stirling boiler with the system of battling designed .by me; Fig. 2, asimilar view showing a slight modification in the inclination of' the'tube's and the bafll'ing; and'Fig. 3,- face and edge viewsof'one of the z 'obaise plates.. i

Similarreference numerals' indicate similar-parts il! the several views.A i

Referring to Fig. 1, the numeral 1 designatos'. the walls of the boi-ler' setting; v2 the '25gfurace; 3, 4C and 5 banks ofg'enerating -tubes expanded at their lower ends into a mud .drum 6 and at their upper endsinto j steam' vand water drums 7, 8" and 9 respectively. vThese latter drums are connectedby so `watercirculator's loand 11, and steam crf culators`12. A' covering? ofl fire bricks 1 0 and -11 resting on the watercireulator tubes 10 and 11 prevents the gases passingabove these' tubes. A steam main 13 leads from thev central drum 8 to the cross box 145 off-a4 superheater 15 placed in the 'upper' part of' Athe space between the front' and". middle banks of tubes. In the standard Stirling boiler ab'afle extends alongfthe rear tubes 40"'-of the front bank upwardlyfrom the drum to near the upper end ofthe tubes', and a second baffle extends from thefdrum 8 along the reartubes of the middle` bank4 to near' the lower end of the tubes, these two baffles `guiding the rases up'the rst bank of tubes, down the middle'ban'k, and up the rear bank. To increase the heat transfer rate and the ei'ciency'of the boiler I haveprovidedfthe following `described ,System of' battling .whereby 'the gases are made to" cross and recross the tubes a greater number of times Jth'an with the normal bafiling. Extending from the mud drum '6 nearly tothe top of tlie r'st bank vof tubes and resting against the rearl tubes,.is thefusual baffle 16. Ini"stfe'ad f the usual baffle' resting on the rear 'j tubesof the middle bankll have placed a.

Baffie-17, made of plain' tiles, along the front grow'- Oftubes of the rear bank and extending fro'rndr'um 9 nearly to 'the Vbottom of the -rea'n bank. Thisv permits a full sweep oflthe 'gases'ae'i'oss the upper part of all the -tubes of the middle bank. To cause the gases' to cross and recross the tubes of the. `middle -and rear" banks Iintroduce a cross baiile'y 18 extending laterally from baie 16 among'thetubes of the middle bank andbelow this, 4 and in staggered relation thereto," i, asecond cross baffle' 19 extendinglaterally l from bafle 17 among the tubes ofthe middle/7o bank. li also''ir'rtroduceV a lower cross 'baille `.20 extendinglat'erally from the lower .part y off baffle 17 among' the. tubes of the rear "bank, and above this a second balile 2 1 exlten'ding from the rear wall of the setting to 75 or`-among the tubes 'of thegrear bank. The 'cross baffles may be of iron' or other` refrac' tony 4substance`supported in A part byl clamps 22. fastened to the tubes and-made up of sect'i'ons`fwh`iel1 can "be introduced: qsid'ewise 80 ''bet`v\ feen' the tubes andturned 'at right .anrles bring'tbeni. 'n placebtweenth tu es.

4lnfFig. 3,', I' have shown afa'ce and edge 'view of'zlone( of t'le sections, Y

I" Fig. 2,' he upper cross baiilej23; in the 85 middle bank of tubes extends entirely' across theV bank to the superheater .box '14 and a narrow shelf 24 isl placed between the two superheater boxes, as shown, to prevent the Agases passing downwardly tothe lower part oflthefmiddle bank.'l instead of resting the ,baille on the tubes ofthe rear bank, as in Fig. l., lffhave modified that baille byl extending' bailleY 2 5'from drum 9 down to the rear tubes ofthe middle bank, and by sup 95 portingv it upon abeam or cross piece 26. The lower cross baffle 19- in Fig. 2,y is substanti'ally' the same as in Fig. 1, but the cross baille 27 at the lower part of the rear bank is inclined downwardly instead of being substantially at right angles to the tubes.l

A shelf 28 extends from the rear wall of the setting to the tubes of the rear bank.

In both boilers above described the gases from the furnace are guided up the front bank of tubes, deflected across the superheater tubes into and across the top of the middle bank, down the latter and up the rear bank to the stack outlet 29. While traversing the middle and rear banks in the general direction of' their length, the gases are -made to cross and recross the' the temperature of the gases which come in.

contact with the rear steam and water drum isv much higher than with the standard baffling, and to make sure that thereshall be no overheating of this drum the circulators 11 are introduced and form an important part of the invention.4 In operating the boiler at high capacities the water level-in the rear stealn and water drum is lower than in the others and adding the water circulators 11 provides for a flow of water from the middle to the rear drum and for the cooling of the rear drum 'by the circulation of this water. The overheating of the rear drum isalso guarded against by the use of protecting tiling 30.

My invention is not limited tothe exact arrangement of cross ballles-shownin the second and third passes of thefb'oiler','but applies to a special construction of the boiler where the water circulating tubes 11 are placed betweenl the middle and rear steam and water drums, and cross baiiies are employed in either the second or third bank of tubes, or both of said'banks,- in combination with a baille between the second and third banks to. cause the gases to iiow first over the second and then over the third bank WhatI claim and desireto secureby I ters Patent of the United States isz'- 1. A -Stirling boiler vcomprising three banks of generating tubes, a drum into which the lower ends of the tubes are expanded, steam and water drums into which the upper ends of the tubes are expanded, water -circulators between'both front andi middle mel middle and rear steamand water drums, a baiile placed back of the first bankzoftubes to direct the gases to the upper part. of said tubes, a cross baliie extending from said first named baffle into and among the tubes ofthe middle bank, a baffle extending downward from the rear steam and water drum, cross baffles extending laterally from said' rear baiiie, one of s aid cross baffles being at the lower part'of the tubes of the middle vbank and vthe other at the lower part of the tubes of the rear bank, and a fourth cross baille extendingfrom the rear wall of the setting to or across the rear bank of tubes at the upper part thereof, rwhereby the gases aremade to cross and recross'the tubes of both the middle and rear banks l three .times while traveling in the general direction of their length.l

2. A' Stirling boiler comprlsing three 'banks of generating tubes, a drum into which the lower ends of the tubes are ex# panded, steam and water drums into which the upper ends o f the tubes-are ex};)anded, water `circulators between both -front and middle and middle and rear' steam and water drums, a baii'ie placed back of the first bank of tubes'to direct the gases tothe up. per part of said tubes, a cross bale extending from said first named baiie into and among the tubes of themiddle bank, a balile extending downward from the rear steam and water drum, a protecting covering of tiling or other refractory material at the front of the rear steam and water drum, cross baiiles extending laterally from said rear baiiie, one of said cross baiiies being at the lower `part of the tubes of. the middle' bank and the other at the lower part of the tubes of the rear bank, and a fourthv cross baille extending from the rear wall of the setting to or across the rear bank of tubes at the upper part thereof, whereby the gases are made to cross and recross the tubes of both themiddle and rear banksthree times while traveling in the general direction'of their length. v y

8. A Stirling boiler comprising three banks of generating tubes, a drum into which the lower ends of the tubes are exl panded, steam and water drums 'into which the upper ends of the tubes are expanded, water circulators between both front and middle and'middle and rear steam and water drums', a' baille to direct the gases to the upper part of the first bank of tubes, crossbaiiies in the third bank of tubes, and a baffle between the second and third bank of tubes for -causing, the gases to iiow first over the second and then over the third bank of tubes. 4. A Stirling boiler comprising three banks of generating tubes, a drum into -which the lower ends' of the tubes are expanded, steam and water drums into which the upper ,ends of the tubes are expanded, water circulators between both front and middle and middle and rear steam and water drums, a baile to direct the gases to the upper part of the rst bank of tubes, cross in testimony whereof I have hereunto l biies in the third bank-of tubes, and a baie signed myV name in the presence of two subbetween the second and third bank'of tubes scribing Witnesses.

extending downward from the rear steam Y DAVE) S. JACBUS. 5 and water drum todirect the gases down- Witnesses:

werd to the bottom of the second bank of E. CAMP,

tubes. 'E P.. TERRY. 

